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Date: | Thursday 27 October 2016 |
Time: | 09:51 |
Type: | Aerospool WT-9 Dynamic |
Owner/operator: | Aerospool |
Registration: | OM-DYF |
MSN: | DY-507/2014LSA |
Fatalities: | Fatalities: 0 / Occupants: 1 |
Other fatalities: | 0 |
Aircraft damage: | Destroyed |
Category: | Accident |
Location: | 2NM south from LZPE -
Slovakia
|
Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
Nature: | Test |
Departure airport: | Prievidza Airport (LZPE) |
Destination airport: | Prievidza Airport (LZPE) |
Investigating agency: | LNVU |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:On 27 October 2016 during a test flight of intentional tail spins for the purpose of verifying the fulfilment of the CS - LSA certification specification, a pilot with a WT9 Dynamic LSA / Club type airplane, registration number OM-DYF (hereinafter referred to as WT9), after a standard tail spin after one turn and the performance of a standard negotiation, continued in the tail spin. The airplane did not even react to the pilot's next attempt to perform a standard way of negotiation. During the airplane take-off, he probably went into a flat tail spin and even the subsequent pilot's interventions, including the use of a spin-recovery parachute which did not open, were not successful and the rotation was not stopped. The pilot left the airplane by jumping with a back-type rescue parachute and he landed uninjured. The airplane hit a field in the cadastral area of the village of Koš-Laskár. The airplane fall did not cause anyone any injuries. The airplane was destroyed during this air event.
Cause of the aviation accident
- the WT9 airplane, in the FG912T configuration type, did not have a tendency to negotiate left tail spins.
- the definite cause of the ineffectiveness of the standard way of left tail spin negotiation after 1 turn could not be detected;
- the combination of several impacts on the characteristics of left tail spin negotiation at the maximum weight and a rear center of gravity was the probable cause;
- the deflection of the directional rudder did not induce a sufficient moment to stop the rotation probably due to the lesser efficiency induced by the airplane position in the tail spin which corresponded to the flat tail spin;
- the original unadjusted altitude rudders were used.
Accident investigation:
|
| |
Investigating agency: | LNVU |
Report number: | |
Status: | Investigation completed |
Duration: | 5 months |
Download report: | Final report |
|
Sources:
https://myhornanitra.sme.sk/c/20369217/pri-kosi-spadlo-male-sportove-lietadlo.html Revision history:
Date/time | Contributor | Updates |
28-Oct-2016 18:00 |
guiness |
Added |
28-Oct-2016 18:08 |
Anon. |
Updated [Aircraft type, Operator, Total fatalities, Total occupants, Source, Narrative] |
30-Oct-2016 11:41 |
Anon. |
Updated [Cn] |
30-Aug-2018 19:41 |
harro |
Updated [Other fatalities, Narrative, Accident report, ] |
17-Nov-2022 19:45 |
harro |
Updated [Departure airport, Destination airport, Narrative, Category] |
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